1 6 SiDEBOTTOM, Foraminifera from the Bay of Palermo. 



off. In Fig. 17, PI. I, two tests appear to be joined 

 together. Is this a case of plastogamy ? In one example the 

 Lagena has evidently been broken off from the irregular 

 chamber, and has left a circular mark with the small 

 nipple orifice in the centre, the contour of the irregular 

 chamber remaining undisturbed. 



There are nine other examples on the slide, but most 

 of them are smaller, and not in such good condition as 

 those chosen for illustration. 



Lagena seinistrata, Williamson. (PI, 2, fig. 2). 



Very good examples are on the slide, and they are 

 evidently of frequent occurrence. There is considerable 

 variety in the shape of the tests. 



Lagena sulcata, Walker and Jacob, sp. 

 Two examples. 



Lagena sulcata (W. and J.), var. interrupta, Williamson. 

 Three or four only. 



Lagena acuticosta, Reuss. 

 Very rare. 



Lagena gracilis, Williamson. 



One test is exactly like fig. 12, pi. i in WilHamsdin's 

 "Recent Foraminifera of Great Britain " (1858). In the 

 other examples the number of costae varies from four 

 upwards, 



Lagena clavata, d'Orbigny, sp. 



Lagena gracillima Sequenza, sp. 



Lagena distoma, Parker and Jones. 

 A single good specimen. 



